在JText字段中创建用户不能在java中编辑的文本

我正在创建一个类似于星球大战游戏sabacc的游戏。我正在尝试创建一个Jtextfield，它在屏幕上已经有三个卡套件。用户将按下一个按钮，根据他们按下的按钮，卡片套装将更改为不同的套装。如果他们得到三套相同的套房，他们就赢了。但是我在屏幕上显示文字时遇到了问题。到目前为止，我一直收到一个错误，说静态内容不能引用非静态方法

以下是我的主要应用程序代码：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class CardApp extends JFrame implements ActionListener {

    private JButton oneButton, 
                    twoButton, 
                    threeButton;  
    private int width = 25;
    private int height = 15;



    public CardApp() {
        //JPanel boardPanel = new JPanel(new GridLayout(height,width));
        JPanel buttonPanel = new JPanel(new GridLayout(1, 3));
        JTextField TextField = new JTextField(30); 

        Hand settingTheText = new Hand();

        TextField.setText(settingTheText.ListOfCards());

        oneButton = new JButton("1");
        twoButton = new JButton("2");
        threeButton = new JButton("3");


        // Listen for events on each button
        oneButton.addActionListener(this);
        twoButton.addActionListener(this);
        threeButton.addActionListener(this);

        // Add each to the panel of buttons
        buttonPanel.add(oneButton); 
        buttonPanel.add(twoButton); 
        buttonPanel.add(threeButton); 
       // Add everything to a main panel attached to the content pane
        JPanel mainPanel = new JPanel(new BorderLayout());
        getContentPane().add(mainPanel);
        mainPanel.add(TextField, BorderLayout.CENTER);
        mainPanel.add(buttonPanel, BorderLayout.SOUTH);

        setTitle("Sabacc Example by Angela Rucci");
        setSize(375, 200);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }


    public void actionPerformed(ActionEvent e) {
                int pressed = 0;
                if (e.getSource() == oneButton){
                        pressed = 1;}
                if (e.getSource() == twoButton){
                        pressed = 2;}
                if (e.getSource() == threeButton){
                        pressed = 3;}
                 Hand handObject = new Hand();

///这就是我犯错误的地方//

这是另一个文件，我在那里得到我的西装清单

package cardapp;
import java.util.Random;
import javax.swing.JOptionPane;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Hand {
String [] Suits = {"C", "H", "S", "D"};
String [] probability = {"C","H","R","D"};
Random randomInt = new Random ();
String RandomSuit;
String RandomShuffle;
String ThreeSuits;
String LeftSuit;
String MiddleSuit;
String RightSuit;
int pressed = 0;



       public int Discards(int pressedNumber){

              return pressed;

             }



       public void Randomizer (){

           int RandomSuitNumber = randomInt.nextInt(4);//this is generator a random number

           //------------------Decide what hand to randomize --------------------------//
           if (pressed==1){
                  LeftSuit= Suits[RandomSuitNumber];
                  }

              if (pressed==2){
                 MiddleSuit=Suits[RandomSuitNumber];
                  }

              if (pressed==3){
                  RightSuit=Suits[RandomSuitNumber];
                    }
          //----------------20% chance of new random set------------------------------------//
            int ProabilityRandomNum = randomInt.nextInt(5);//this will create a random number for probability array
            RandomShuffle= probability[ProabilityRandomNum];//this will pick a random letter in proability array


          //------------If proability array equals R then change all of the suits----------//  
            if (RandomShuffle.equals("R")){
                JOptionPane.showMessageDialog(null, "Randomized Hand!");
                int leftNumber = randomInt.nextInt(4);
                int middleNumber = randomInt.nextInt(4);
                int rightNumber = randomInt.nextInt(4);
                LeftSuit= Suits[leftNumber];
                MiddleSuit= Suits[middleNumber];
                RightSuit= Suits[rightNumber];}

            ThreeSuits = (LeftSuit + MiddleSuit + RightSuit); 
       }


       public String ListOfCards (){
              return ThreeSuits;
             }




         public void GameOver(){
                  if (LeftSuit == MiddleSuit && MiddleSuit == RightSuit &&    


    RightSuit== LeftSuit){
                      JOptionPane.showMessageDialog(null, "WINNER!!");
                     }
             }
    }

---

变量是方法的局部变量。JTextField文本字段仅对CardApp（）可见。如果希望它对整个类可用，请将其作为私有类成员：

public class CardApp extends JFrame implements ActionListener {

    private JButton oneButton, 
                    twoButton, 
                    threeButton;  
    private int width = 25;
    private private int height = 15;
    // available to all methods
    // better naming convention was JTextfield tf = new JTextField(30);
    // even stackoverflow thinks its a class name :)
    // see the color highlighting
    private JTextField TextField = new JTextField(30);

    public CardApp() {
        //JPanel boardPanel = new JPanel(new GridLayout(height,width));
        JPanel buttonPanel = new JPanel(new GridLayout(1, 3));
        //JTextField TextField = new JTextField(30); 

        Hand settingTheText = new Hand();

        TextField.setText(settingTheText.ListOfCards());
     }
     //
     // code continues here ...
     //
}

很多答案都很好地解释了这一点。

public class CardApp extends JFrame implements ActionListener {

    private JButton oneButton, 
                    twoButton, 
                    threeButton;  
    private int width = 25;
    private private int height = 15;
    // available to all methods
    // better naming convention was JTextfield tf = new JTextField(30);
    // even stackoverflow thinks its a class name :)
    // see the color highlighting
    private JTextField TextField = new JTextField(30);

    public CardApp() {
        //JPanel boardPanel = new JPanel(new GridLayout(height,width));
        JPanel buttonPanel = new JPanel(new GridLayout(1, 3));
        //JTextField TextField = new JTextField(30); 

        Hand settingTheText = new Hand();

        TextField.setText(settingTheText.ListOfCards());
     }
     //
     // code continues here ...
     //
}